Here are two that delighted me:
The smell in the hall was like the smell of my breath when I breathed and rebreathed it into my cupped hands to know what it would be like to be suffocated.
...the girl's swimsuit, lying where she had tossed it, limply wadded and stuck along one wet edge with a fringe of sand, like something thrown up drowned out of the sea.
I remember a metaphor from the first story I ever published. My main character cut off two of his fingers while trying to slice a tomato. As he searched his apartment for a bandage, he made red bird prints on the wall.
What are the best or most embarrassing similes/metaphors you've ever written?